Embodiments that facilitate the use of pluggable policy modules and authentication modules for access to a Terminal Services (TS) server are disclosed. In accordance with various embodiments, a method includes accessing one or more pluggable modules at a Terminal Services Gateway (TSG) server or a Terminal Services (TS) server. The method further includes processing a TS server access request from a TS client at the TSG server or the TS server. The TS server access request is processed in part based on the one or more pluggable modules. In one particular embodiment, the one or more pluggable modules include at least one of a connection authorization policy (CAP) module, a resource authorization policy (RAP) module, and an authentication module.